I'm not sure ... is that a helicopter exhibition team? I've been to a ot of airshows and some things tend to blur over time. I know I've seen the Blue Bells ... and I've been to three different World Helicopter Championships where they had exhibition as well as competition teams.
BTW Jonny - I dug out the manuals and I have BDA manuals for AH-1, UH-1 and OH-58, plus a TM for the CH-47A and C. But I'm keeping the OH-6 manual ... writing another book, you know.